The name Infant has its origins in the late Latin word "infans," which means "unable to speak." This word was derived from the prefix "in-" meaning "not" and the root "fan" meaning "to speak." The name was used to refer to young children who had not yet developed the ability to speak.

During the Middle Ages, the term "infans" was commonly used in legal contexts to denote a minor or a person who had not yet reached the age of majority. In some regions, it was also used as a given name for newborn babies, reflecting the child's inability to communicate through speech.

One of the earliest recorded references to the name Infant can be found in the Domesday Book, a manuscript survey of English landholdings commissioned by William the Conqueror in 1086. In this document, there are instances of individuals named Infans or Infanz, suggesting that the name was in use in England during the Norman period.

Throughout history, there have been several notable individuals who bore the name Infant. One of the most famous was Infant Juan of Aragon (1350-1396), also known as the Infant of Majorca, who was a Prince of the Crown of Aragon and the son of King Peter IV of Aragon. He played a significant role in the conflicts between the Crown of Aragon and the Kingdom of Castile during the 14th century.

Another notable figure was Infant Sancho of Aragon (1337-1347), who was the son of King Alfonso IV of Aragon and his wife, Eleanor of Castile. Although he died at a young age, he held the title of Count of Ribagorza and was briefly considered as a potential heir to the throne of Aragon.

In the 15th century, there was Infant Ferdinand of Aragon (1452-1516), who was the second son of King John II of Aragon and Queen Juana Enriquez. He was granted the title of Duke of Montblanc and played a significant role in the administration of the Crown of Aragon during his father's reign.

Moving to a different region, Infant Ishmael (1487-1557) was a prince of the Safavid dynasty in Persia (modern-day Iran). He was the son of Shah Ismail I, the founder of the Safavid Empire, and was considered a potential heir to the throne at various points in his life.

In the 16th century, there was Infant Louis of Spain (1545-1576), who was a Prince of Spain and the youngest son of King Philip II of Spain and his first wife, Maria Manuela of Portugal. He held various titles and appointments during his life, including that of Governor of the Netherlands.